I enjoyed this during MGGJ10, and it's still fun now! I played it twice today because I forgot there were two attacks and only used the basic shot the first time. XD
I can't remember what is all new vs old (aside from reading the devlog) but I did watch your many updates in the discord, so I know you've been working on it! I didn't really understand the bells and how they relate to scoring... do they give a bonus of some sort? I was able to destroy some of them.
The big cannon boss was cool in theory, but it dies before it's on screen if you are holding down the attack button. The second boss is a little too easy as well.
The devlog is fairly simple, but it at least outlines your progress and struggles!
Nice work and a fun game!